An implementation of a radio button menu item.
A JRadioButtonMenuItem is
a menu item that is part of a group of menu items in which only one
item in the group can be selected. The selected item displays its
selected state. Selecting it causes any other selected item to
switch to the unselected state.
To control the selected state of a group of radio button menu items,
use a ButtonGroup object.

Menu items can be configured, and to some degree controlled, by
Actions. Using an
Action with a menu item has many benefits beyond directly
configuring a menu item. Refer to
Swing Components Supporting Action for more
details, and you can find more information in How
to Use Actions, a section in The Java Tutorial.

For further documentation and examples see
How to Use Menus,
a section in The Java Tutorial.

Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing. As of 1.4, support for long term storage
of all JavaBeans™
has been added to the java.beans package.
Please see XMLEncoder.

paramString

Returns a string representation of this
JRadioButtonMenuItem. This method
is intended to be used only for debugging purposes, and the
content and format of the returned string may vary between
implementations. The returned string may be empty but may not
be null.

getAccessibleContext

Gets the AccessibleContext associated with this JRadioButtonMenuItem.
For JRadioButtonMenuItems, the AccessibleContext takes the form of an
AccessibleJRadioButtonMenuItem.
A new AccessibleJRadioButtonMenuItem instance is created if necessary.